diff --git a/HELP.md b/HELP.md
index 9c422cf..57517cd 100644
--- a/HELP.md
+++ b/HELP.md
@@ -19,3 +19,15 @@ You need to enable node_status for each device, and they need to have `node_stat
 {% endfor %}
 {{ ns.result }}
 ```
+
+# List batteries entities
+
+```
+{% set ns = namespace(below=[]) %}
+{% for s in states.sensor 
+   if s.entity_id is search('battery') and s.state != 'unknown'
+    %}
+{% set ns.below = ns.below + [s.entity_id] %}
+{% endfor %}
+{{ ns.below |sort| join(', ') }}
+```